On the Status of Bischoff's Song Sparrow (Melospiza insignis Baird)
نویسندگان
چکیده
منابع مشابه
Seasonal Differences of Gene Expression Profiles in Song Sparrow (Melospiza melodia) Hypothalamus in Relation to Territorial Aggression
BACKGROUND Male song sparrows (Melospiza melodia) are territorial year-round; however, neuroendocrine responses to simulated territorial intrusion (STI) differ between breeding (spring) and non-breeding seasons (autumn). In spring, exposure to STI leads to increases in luteinizing hormone and testosterone, but not in autumn. These observations suggest that there are fundamental differences in t...
متن کاملIntrinsic parent-offspring correlation in inbreeding level in a song sparrow (Melospiza melodia) population open to immigration.
The extent to which offspring resemble their parents in genotype and phenotype underpins patterns of genetic and phenotypic variation, selection, and evolution in natural populations. Genetic and phenotypic resemblance can clearly result from additive genetic variance and can be shaped by nongenetic parental and common environmental influences. In contrast, there is no straightforward expectati...
متن کاملOffspring fitness varies with parental extra-pair status in song sparrows, Melospiza melodia
Numerous studies have tested for indirect selection on female extra-pair reproduction (EPR) by quantifying whether extra-pair young (EPY) are fitter than their within-pair young (WPY) maternal half-siblings. In contrast, the hypothesis that offspring of EPY and WPY (rather than the EPY and WPY themselves) differ in fitness has not been tested, even though inter-generational effects of parental ...
متن کاملTesting the function of song-matching in birds: responses of eastern male song sparrows Melospiza melodia to partial song-matching
Song-matching has been hypothesized to be a signal of aggressive intentions whereby matching an opponent signals that the singer is likely to attack. Theory predicts that an aggressive signal should impose a cost that enforces the signal’s reliability. A receiver-dependent cost imposed by the matched bird’s aggressive retaliation has been proposed for song-matching. We tested for such a cost fo...
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ژورنال
عنوان ژورنال: The Auk
سال: 1895
ISSN: 0004-8038,1938-4254
DOI: 10.2307/4068833